For a short time the position of a roller-coaster car along its path is defined by the equations r=25 m, θ=(0.3t) rad, and z=(−8
cosθ) m, where t is measured in seconds, Determine the magnitudes of the car's velocity and acceleration when t=4s .
1 answer:
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Answer:
Emitted power will be equal to
Explanation:
It is given factory whistle can be heard up to a distance of R=2.5 km = 2500 m
Threshold of human hearing
We have to find the emitted power
Emitted power is equal to
So emitted power will be equal to
Answer:
t = 2 s
Explanation:
As we know that fish is pulled upwards with uniform maximum acceleration
then we will have
here we know that maximum possible acceleration of so that string will not break is given as
now we have
now for such acceleration we can use kinematics
t = 2 s